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Sagot :

Explications:

Bonjour,

Pression = Force / Surface

1 Pa = 1 N/m2

donc 120 Pa = 120 N/m2

ici 120 = P / 0.25 donc P = 120 * 0.25 = 30 N

si on prend g = 10 N/kg et comme P = mg

on obtient m = 30 / 10 = 3kg

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